Construction method of large-area arc-shaped glass roof curtain wall

Abstract

The invention relates to a construction method for a large-area arc-shaped glass roof curtain wall. The construction method comprises the following steps of construction preparation; the arc-shaped steel structure base, the arc-shaped glass and the machined part are manufactured in a workshop; carrying out field measurement, carrying out simulation positioning on the arc-shaped steel structure base on a computer by adopting computer aided design software according to a curtain wall design construction drawing and field actual measurement, then exporting the drawing to carry out field measurement, and converting a computer positioning point to field positioning; performing three-dimensional simulation pre-construction by adopting a BIM model, and performing visual technical disclosure for constructors; the arc-shaped steel structure base and the arc-shaped glass are sequentially installed according to the positioning points; caulking and sealing; carrying out a water spraying test; cleaning and checking; completing acceptance; the method has the advantages that computer-aided design positioning is combined with on-site construction measurement, an original pure on-site measurement method is improved, and the accuracy of curtain wall framework positioning and mounting is improved, so that the construction efficiency is improved, and the process is more mature.

Description

Technical Field

[0001] The present invention relates to the field of engineering construction, and particularly to a construction method for a large-area arc-shaped glass roof curtain wall. Background Art

[0002] As an exterior enclosure structure of a building, a glass curtain wall has excellent properties such as architectural art, forming building space, providing a comfortable environment, facilitating people's lives, saving social resources, and avoiding natural disasters such as lightning strikes and fires, and is deeply loved by designers. It has been widely used by designers in the exterior wall decoration of various buildings, such as shopping malls, hotels, exhibition centers, cultural and art exchange centers, airports, stations, stadiums, etc. Among them, the arc-shaped glass roof curtain wall is one of the frequently selected shapes in the curtain wall shapes of many large public buildings.

[0003] In recent years, arc-shaped glass roof curtain walls have been used in many projects. However, the installation and construction procedures of such curtain walls are numerous, and the requirements for measurement and setting out techniques are high. Only by strictly controlling and inspecting can the arc of the curtain wall be accurately and the circular arc curve be perfect. In order to make the construction technology of the arc-shaped glass roof curtain wall more standardized and mature, the construction quality more guaranteed, and at the same time further improve the construction management efficiency, this case is proposed for reference in relevant engineering projects. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for a large-area arc-shaped glass roof curtain wall to improve the accuracy and convenience of curtain wall installation, thereby improving construction efficiency and ensuring construction quality.

[0005] In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A construction method for a large-area arc-shaped glass roof curtain wall, characterized by including the following steps:

[0007] S10. Construction preparation;

[0008] S20. Arrange the fabrication of the arc-shaped steel structure base, arc-shaped glass, and fabricated parts in the workshop according to the graphic dimensions drawn by the drafting software;

[0009] S30. Conduct on-site measurement. According to the curtain wall design construction drawing and on-site actual measurement, use the computer-aided design software Revit of BIM to simulate and position the arc-shaped steel structure base on the computer, and then export the CAD detailed drawing for on-site measurement, and convert the computer positioning points to on-site positioning;

[0010] S40. Use the BIM model to conduct three-dimensional simulation pre-construction and provide visual technical disclosure to the construction personnel;

[0011] S50. Install the arc-shaped steel structure base and arc-shaped glass successively according to the positioning points.

[0012] S60. Caulk and seal.

[0013] S70. Conduct a water spray test.

[0014] S80. Clean and inspect.

[0015] S90. Conduct a final acceptance inspection.

[0016] Furthermore, the simulation positioning in step S20 includes the following processes:

[0017] S31. Use the revit software to model the steel structure according to the design drawings, divide the grid according to the midpoint grid size of the arc-shaped steel structure curved pipe between two adjacent curtain walls, and extend it with the three midpoints of the lower-upper-lower crossbeams as the endpoints to determine the height of the glass. Customize the arc-shaped glass model with the revit software and conduct a simulation layout.

[0018] S32. After determining the curtain wall grid, determine the grid points of the central axis of the first arc-shaped steel structure square pipe in the revit software and divide the grid successively.

[0019] S33. Draw a horizontal line from the horizontal crossbeam square pipe in the 3D model, extend it from the lower horizontal line to the upper roof crossbeam according to the vertical height, draw the reference line, and establish a rectangular coordinate system.

[0020] S34. According to the gap between the glasses in the drawings, reserve the actual positioning line for the gap distance of the glass to ensure that the gap sizes are consistent and the two roof glasses are butted.

[0021] S35. According to the glass finish situation, measure and verify the size of the arc-shaped steel structure base, check whether the size needs to be adjusted, and position it on the arc-shaped steel structure square pipe.

[0022] S36. Export the deepened CAD drawings through the deepened BIM model of the roof glass curtain wall.

[0023] Furthermore, in step S20, the process of converting the computer positioning points to on-site positioning is as follows:

[0024] S37. Use the total station to conduct coordinate lofting on points A and B at the midpoints of the steel structure columns to determine the actual positions of points A and B, then extend and lead them to the roof arc-shaped steel structure square pipe, conduct four-corner extension positioning, and at the same time, conduct measurement and verification according to the grid until it is correct.

[0025] S38. Use the level to position the lower, roof, and lower crossbeams of the steel structure, and mark the height data from the midpoint to the glass finish from the midpoints of the three crossbeams.

[0026] S39. Detect whether the radian of the installation of the square pipe of the arc-shaped steel structure is accurate from the horizontal line of the crossbeam. If it is accurate, the order can be placed according to the drawing. If there is an error, adjust the height of the arc-shaped steel structure base to ensure the accuracy of the arc;

[0027] S310. Perform panel positioning and zoning according to the existing positioning and zoning data.

[0028] The advantages of the present invention are as follows:

[0029] 1. This method is applied to the construction project of large-area arc-shaped glass roof curtain walls. In such projects, the center cannot be determined at the construction site. This solution combines computer-aided design positioning with on-site construction measurement, improves the original simple on-site measurement method, enhances the accuracy of the positioning and installation of the curtain wall skeleton, thereby improving the construction efficiency and making the process more mature; it has certain operability, creativity and applicability, can shorten the construction period and save project costs, and can be widely applied in the core area of the arc-shaped roof glass curtain wall of complex arc-shaped building structures;

[0030] 2. The arc-shaped steel structure bases, processed parts, and arc-shaped glass plates processed in the production workshop are installed piece by piece on-site, which is convenient for installation and easy to adjust;

[0031] 3. Use the BIM model for three-dimensional simulation pre-construction, avoid potential collision problems during construction in advance, optimize the construction process, and give visual technical disclosures to construction workers, making the workers more skilled and comfortable in actual operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic flow chart of the construction method of the large-area arc-shaped glass roof curtain wall in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following further describes the present invention in detail with reference to the embodiments. It should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. in the text are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0034] This embodiment provides a construction method for a large-area arc-shaped glass roof curtain wall. As Figure 1 shown, it includes the following steps:

[0035] S10. Construction preparation;

[0036] S20. Arrange the fabrication of the arc-shaped steel structure base, arc-shaped glass, processed parts, etc. in the workshop according to the graphic dimensions drawn by the drafting software.

[0037] S30. Conduct on-site measurement. According to the curtain wall design construction drawings and the on-site actual measurement, use the computer-aided design software Revit of BIM to simulate the positioning of the arc-shaped steel structure base on the computer, then export the CAD detailed drawings for on-site measurement, and convert the computer positioning points to on-site positioning.

[0038] S40. Use the BIM model to conduct three-dimensional simulation pre-construction and give visual technical disclosure to the construction personnel.

[0039] S50. Install the arc-shaped steel structure base and arc-shaped glass in sequence according to the positioning points.

[0040] S60. Caulking and sealing.

[0041] S70. Water spray test.

[0042] S80. Cleaning and inspection.

[0043] S90. Completion acceptance.

[0044] The construction preparation in step S10 includes the following contents: Strictly purchase materials such as the skeleton materials, plates, sealant materials, structural bonding materials, and hardware according to the requirements of the design drawings, and ensure that there are inspections for incoming and outgoing goods. Relevant materials must have quality assurance certificates and performance test reports. Strictly control the material quality, and unqualified materials are prohibited from being used. Structural adhesives and weather-resistant adhesives must undergo compatibility tests. When handling and hoisting components, they shall not be collided or damaged. When the components are stacked on-site, they shall be classified and stacked on wooden pads according to the variety and specification.

[0045] In step S20, the fabrication of the arc-shaped steel structure base, arc-shaped glass, processed parts, etc. in the workshop can save steel and reduce on-site processing.

[0046] In step S30, the on-site measurement process is as follows: According to the large-scale elevation drawing of the curtain wall grid and the reference control points and lines of the structural construction elevation and axis, re-survey and set each reference control line for curtain wall construction. When setting out the lines, according to the positioning and grid dimensions required by the design, first set the positioning control points and lines on the column of the steel structure wall on both side facades, and then use a theodolite or a laser plumb instrument to lead the vertical control lines and the elevation center control lines upward at the large corners around the curtain wall. Directly draw the led control lines on the upper surface of the steel structure arc-shaped steel beam for calibration. Use a level and a standard steel tape to set the horizontal elevation control lines for each floor. The horizontal elevation should be introduced from the building elevation control lines of each floor. To avoid causing different heights of the curtain walls on each floor, attention should be paid to distributing the errors during measurement and not allowing the errors to accumulate. Finally, according to the design large-scale drawing and the set vertical, center, and elevation control lines, pop out the installation position lines of the horizontal and vertical frames, grids, and corners. During the construction process, each control line should be regularly calibrated to ensure the accuracy of the curtain wall verticality and the position dimensions of each part.

[0047] The simulation positioning on the computer includes the following process:

[0048] S31. According to the design drawings, use revit software to model the steel structure. According to the grid size at the midpoints of the two adjacent arc-shaped steel structure curved square tubes of the curtain wall, and extend with the three midpoints of the lower-upper-lower crossbeams as the endpoints to determine the height of the glass. Customize the arc-shaped glass model with revit software for simulation placement;

[0049] S32. After the curtain wall grid is determined, determine the grid points of the center axis of the first arc-shaped steel structure square tube in the revit software and divide the grids in sequence;

[0050] S33. In the 3D model, draw a horizontal line from the horizontal crossbeam square tube, extend it from the lower horizontal line to the upper roof crossbeam according to the vertical height, draw the reference line, and establish a rectangular coordinate system;

[0051] S34. According to the gap between the glasses in the drawings, leave the actual positioning line for the glass for the gap distance between the glasses to ensure that the gap sizes are the same and the glasses on the two roofs are butted;

[0052] S35. According to the glass finish situation, measure and verify the size of the arc-shaped steel structure base to see if the size needs to be adjusted and position it on the arc-shaped steel structure square tube;

[0053] S36. Export the detailed CAD drawings through the detailed BIM model of the roof glass curtain wall.

[0054] The process of converting the computer positioning points to on-site positioning is as follows:

[0055] S37. Use a total station to stake out the coordinates of points A and B, the midpoints of the steel structure columns. Determine their actual positions, then extend the coordinates to the curved steel structure square tubes on the roof, positioning the four corners. Simultaneously, perform measurements and verifications based on the grid until the positions are correct.

[0056] S38. Use a level to locate the lower end of the steel structure, the roof, and the lower end of the three beams. Mark the height from the midpoint of the three beams to the finished glass surface.

[0057] S39. Check whether the arc of the curved steel structure square tube is accurate from the horizontal line of the beam. If it is accurate, you can place an order according to the drawing. If there is an error, adjust the height of the curved steel structure base to ensure the arc is accurate.

[0058] S310. Perform plate positioning and grid division based on the existing positioning and grid division data.

[0059] In step S40, the BIM model is used to perform three-dimensional simulation pre-construction, which can avoid collision problems that may occur during construction in advance and optimize the construction process.

[0060] In step S50, the arc-shaped steel structure base process is as follows:

[0061] Check the model and specifications of the steel structure base → put it in place → install → adjust the three-dimensional direction → fully weld → grind → paint the surface.

[0062] The on-site installation process of curved glass is as follows:

[0063] Check and accept the glass panels → stack the glass panels in layers → initial installation → adjustment → fixation → acceptance.

[0064] The process of step S60 is as follows: After the glass is installed and adjusted, caulking and sealing should be performed according to the design requirements. If there are no design requirements, a neutral silicone weather-resistant sealant should be used. When caulking, first clean the gap and ensure that the bonding surface is clean and dry. Then, apply paper tape on both sides of the gap, and then inject glue. Use a special tool to point the joints while injecting glue. The formed glue surface is curved and concave and uniform without flow. Excess glue should be wiped off with a detergent in time to avoid contaminating the curtain wall surface. When using silicone building sealant, the product should be a fine, uniform paste without bubbles, crusting, or gel; the color should not be significantly different from the agreed sample; and its various physical and chemical performance indicators should meet the specifications.

[0065] After the curtain wall is installed, the water spray test shall be carried out according to the regulations. The test time, water volume, water head pressure, etc. shall comply with the current national standard "Testing Method for Rainwater Leakage Performance of Building Curtain Walls". At the same time, after the curtain wall is installed, the opening and closing of all operable windows shall be debugged one by one to ensure flexible opening and closing, and tight and flat closing. Finally, the entire surface of the curtain wall shall be thoroughly cleaned with a cleaning agent and wiped clean.

[0066] The above embodiments are only used to explain the concept of the present invention, rather than limiting the protection scope of the rights of the present invention. Any non-substantive changes made to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A construction method for a large-area curved glass roof curtain wall, characterized in that, It includes the following steps: S10. Construction preparation; S20. Fabricate the arc-shaped steel structure base, arc-shaped glass, and fabricated parts in the workshop according to the graphic dimensions drawn by the drafting software; S30. Conduct on-site measurement. Based on the curtain wall design construction drawings and on-site actual measurements, use the computer-aided design software Revit of BIM to simulate the positioning of the arc-shaped steel structure base on the computer, then export the CAD detailed drawings for on-site measurement, and convert the computer positioning points to on-site positioning; S40. Use the BIM model to conduct three-dimensional simulation pre-construction and provide visual technical disclosure to the construction personnel; S50. Install the arc-shaped steel structure base and arc-shaped glass in sequence according to the positioning points; S60. Caulking and sealing; S70. Water spraying test; S80. Cleaning and inspection; S90. Completion acceptance.

2. The construction method of a large-area arc-shaped glass roof curtain wall according to claim 1, characterized in that, The simulation positioning in step S30 includes the following processes: S31. Use the Revit software to model the steel structure according to the design drawings. According to the grid size of the midpoints of the arc-shaped steel pipes of two adjacent curtain wall arcs, and extend with the three midpoints of the lower-upper-lower crossbeams as endpoints to determine the height of the glass. Customize the arc-shaped glass model with the Revit software and conduct simulation placement; S32. After determining the curtain wall grid, determine the grid points of the central axis of the first arc-shaped steel pipe in the Revit software and divide the grids in sequence; S33. Draw a horizontal line from the horizontal crossbeam square pipe in the three-dimensional model, extend from the lower horizontal line to the upper roof crossbeam according to the vertical height, draw the reference line, and establish a rectangular coordinate system; S34. According to the gap between the glasses in the drawings, reserve the actual positioning line for the gap distance of the glasses to ensure that the gap sizes are consistent and the two roof glasses are butted; S35. According to the glass finish situation, measure and verify the dimensions of the arc-shaped steel structure base to see if the dimensions need to be adjusted, and position it on the arc-shaped steel pipe; S36. Export the detailed CAD drawings through the deepened BIM model of the roof glass curtain wall.

3. The construction method of a large-area arc-shaped glass roof curtain wall according to claim 2, characterized in that, In step S20, the process of converting the computer positioning points to on-site positioning is as follows: S37. Use the total station to conduct coordinate lofting on points A and B at the midpoints of the steel structure columns to determine the actual positions of points A and B, and then extend and lead them to the arc-shaped steel pipe on the roof for four-corner extension positioning. At the same time, conduct measurement and verification according to the grid until it is correct; S38. Use the level to position the three crossbeams at the lower opening, roof, and lower opening of the steel structure, and mark the height data from the midpoints to the glass finish from the midpoints of the three crossbeams; S39. Detect whether the arc of the installation of the arc-shaped steel pipe is accurate from the horizontal crossbeam line. If it is accurate, the order can be placed according to the drawing. If there is an error, adjust the height of the arc-shaped steel structure base to ensure the accuracy of the arc; S310. Conduct panel positioning and grid division according to the existing positioning and grid data.

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